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There are many different types of lasers. 1_______. The first type of laser was called a ruby laser.2_______. Other lasing mediums can be selected based on the desired emission wavelength, power needed and pulse duration. 3_______. The reason that CO2 laser is so dangerous is because it emits laser light in the infrared and microwave region of the spectrum. 4_______.
The laser medium can be a solid, gas, liquid or semiconductor.
A ruby laser is a solid-state laser which emits at a wavelength of 694 nm.
Some lasers are very powerful, such as the CO2 laser, which can cut through steel.
Infrared radiation is heat, and this laser basically melts through whatever it is focused upon.